Question

In WinForms you can set the bounds of a control using SetBounds, or if you have created a user control, you can override SetBoundsCore. I was wondering, does they both do the same or are there any differences?

Answer 1

First of all SetBounds is not virtual, so if you need to run some extra code when the bounds is set, your only options is to override SetBoundsCore.

SetBounds does some parameter validation, and contains the logic with regards to calling into SetBoundsCore with the correct size based on the BoundsSpecified parameter. It also makes sure not to call SetBoundsCore unless the size actually changes.

In other words, SetBoundsCore is the meat of the implementation, while SetBounds is the public entry point which contain validation and some other housekeeping logic.